The document describes Yasuo, a tool written in Ruby that scans a network to identify vulnerable applications. It does this by checking for over 100 known vulnerable applications and exploits them if possible using Metasploit. The document discusses the need for such a tool, how Yasuo works behind the scenes, recent updates, a demo of Yasuo, challenges, and future plans for the tool. It ends by thanking the audience and requesting help improving Yasuo by submitting more application signatures.